Method of making car-wheels.



S. P. BUSH. METHOD OF MAKING GAR WHEELS.

APPLICATION FILED FEB.28, 1913.

Patented Feb. 3, 1914.

2 M w 7 a s I 2 UNITED sTArEs PAT NT Omen SAMUEL r. nusmor (ioLUMBUs,01110,. ssienon To 'II-IE BUCKEYE STEEL casrmes COMPANY, or COLUMBUS,OHIO, A CORPORATION. I

mn'rrion orm lne CAR-WHEELS.

Speei'fi '2; Lion of Letters Patent.

To all whom it may concern:

Be it known that I, SAMUEL P. Bust-r, of Columbus, in the county ofFranklin and State of Ohio, have invented certain new and usefulImprovements in Methods of Making Car-lVheels; and I do hereby declarethe following to be a full, clear, and exact description of theinvention, such as will enable others skilled the art to which itappertains to make and use the same. f

My invention relates to an improvement in the method of making carwheels having a rim portion made'up of a metal ofone kind chemically andphysically, and a central or inner portion of another kind, the rim ofthe wheel being cast in blank form and subsequently shaped by rolling orpressmg.

a It is necessary in car wheels to have the rim portion which has towithstand heavy pressure, the heat from-brake application, and abrasion,of hard tough and finely grained steel or iron alloy, and the centralportion which must be machined at the hub for mounting on the axle, ofsofter and more malleable metal. It is also absolutely essential thatthe of the wheel shall be free from shrink holes and other imperfectionswhich would tend to weaken the same. The object of my invention is toprovide a wheel blank having its peripherybr rim p o rtionmade up of onekind of metal and a central or inner portion of-another kind,

and subsequently working and reshaping the rim of the blank to form therim of the wheel, this reworking operating to condense and oompact therim into a solid homogeneous mass free from holes or other imperfectionscaused by shrinkage.

In the accompanying drawings Figure "1 is a view of my improved blankafter casting but before working'the rim to form the wheel rim, and Fig.2 is a .view'of the wheel after the rim hasbeen shaped. i

In car wheels it is customary and essential to have the flange 1 of therim .within a plane passing through the hub 4 of the.

wheel, and the outer end of the hub in a plane: intermediate. the edgesof the rim of thewheel as shown in Fig. 2. Y 1n pinning the molten metalinto the mold itgis. introduced at'the center of the 'hub characterdesired-for the rim. This metal passes through slots in the lower end ofthe coreand' up into the hub, and from the latter down the web 7 intothe rim blank 2. When the rim portion of the mold has been filled orsubstantially filled, the pouring is discontinued, and the metaladaptedfor the hub 4 and web 7 is poured without any ma- Patented Feb. 3, 1914.Application filed February 28, 1913. Serial No. 751,372.

' core and the first metal poured is of the terial delay between thepouring steps. The I metal last oured mixes to a certain extent withthat in the hub portion of the wheel and tends to force that-which iswithin the web 7 into the rim 2 so that-fin the event the rim be notwholly filled at the first pour- 'lng, the, metal last poured will forcepart of the metal in the web, into the rim thus wholly filling thelatter. By this method of pouring the metals are kept reasonablydistinct, hencethe rim blank of the wheel iscomposed of metal bestsuited to sustain the wear and friction to which the rim is subjected,while the hub and web are composed of metal that may be readilymachined.

Instead of pouring both metals through the hub, I may pour the metal forthe rim blank directly at the rim, and that for the hub and web throughthe hub, the particular manner; of introducing the two metals into themold being unimportant.

The rim blank 2 isa comparatively thin section preferably of a sectionless than the finished wheel. I .It is well known that steel shrinksconside rably in passing from a fluid to a solid state, and when thesections are heavy the interior metal remains fluid.

longer than the outer-metal and. the latter in solidifying will drawfrom the interior and thus leave voids or spaces commonly known asshrink holes. By making the rim blanks thicker and narrower than thefinished wheel, the blank cools more evenly and there is naturallylessshrinkage than in a larger section.

After the wheel has been thus formed the rim is worked preferablybetween rollers to reduce its thickness and increase its width and formthe flange 1. This'working of the rim blank not only operates tocompress and compaot the rim but'it .closes up any blow or other holesthat may-ha've formed in the rim blank.

Having fully described my invention what section of the finished rim,and subsequently I claim as new and desire to secure by Letworking themetal in the rimblank to form ters-Patent is k the rim and flange of theWheel. a The method of making car Wheels con- In testimony whereof, Ihave signed this 5. sisting in casting the rim blank of one metal,specification in the presence of two subscrib- 15 and the hub and web ofanother metal chemiing witnesses. cally and physically different fromthe metal SAMUEL P. BUSH. of the rim blank, the two metals unitingWitnesses: while in a fluid condition, the rim blank Gno. G. Wnnnmc, 10being thicker and narrower than the cross W. E. PAGE.

